Compound semiconductors have long been an integral part of everyday life. Recent progress on their potential as emitters, sensing devices in biological and chemical environments, and high-efficiency power devices demonstrates their impact on energy and environment. Compound-semiconductor-based photovoltaic systems are emerging as an economical means of generating renewable energy through the use of concentrator technologies. However, while solid-state lighting devices have shown energy-saving and environmental benefits, much still needs to be done to realize their full potential. This book contains reports from internationally known experts on the state of compound-semiconductor-based devices with application in environmental conservation and energy saving challenges. Topics include: compound semiconductors for PV applications; compound semiconductors for lighting; compound semiconductors for lighting, power and sensing; compound semiconductors for energy; compound semiconductors for sensing; and materials growth and characterization. An appendix, with select papers from Symposium S, Materials in Photocatalysis and Photochemistry for Environmental Applications and H2 Generation, is also included in the book.

Compound semiconductors have long been an integral part of everyday life. Recent progress on their potential as emitters, sensing devices in biological and chemical environments, and high-efficiency power devices demonstrates their impact on energy and environment. Compound-semiconductor-based photovoltaic systems are emerging as an economical means of generating renewable energy through the use of concentrator technologies. However, while solid-state lighting devices have shown energy-saving and environmental benefits, much still needs to be done to realize their full potential. This book contains reports from internationally known experts on the state of compound-semiconductor-based devices with application in environmental conservation and energy saving challenges. Topics include: compound semiconductors for PV applications; compound semiconductors for lighting; compound semiconductors for lighting, power and sensing; compound semiconductors for energy; compound semiconductors for sensing; and materials growth and characterization. An appendix, with select papers from Symposium S, Materials in Photocatalysis and Photochemistry for Environmental Applications and H2 Generation, is also included in the book.

Revised and fully up-dated, the second edition of this graduate textbook offers a comprehensive explanation of the technology and physics of LEDs such as infrared, visible-spectrum, ultraviolet, and white LEDs made from III-V semiconductors. Elementary properties such as electrical and optical characteristics are reviewed, followed by the analysis of advanced device structures. With nine additional chapters, the treatment of LEDs has been vastly expanded, including new material on device packaging, reflectors, UV LEDs, III-V nitride materials, solid-state sources for illumination applications, and junction temperature. Radiative and non-radiative recombination dynamics, methods for improving light extraction, high-efficiency and high-power device designs, white-light emitters with wavelength-converting phosphor materials, optical reflectors, and spontaneous recombination in resonant-cavity structures are discussed in detail. With exercises, solutions, and illustrative examples, this textbook will be of interest to scientists and engineers working on LEDs and graduate students in electrical engineering, applied physics, and materials science.